Abstract
Ballistic thermal transport properties in Y-branch three-terminal and H-branch four-terminal graphene junctions are systematically investigated by using nonequilibrium Green’s function method. A comparative analysis for the Y-branch and H-branch quantum structure models is made. The results show that the increased junction in H-branch four-terminal graphene junctions can obviously reduce the thermal conductance of the adjacent quantum channel and slightly influence the thermal conductance of the farside quantum channel. The total thermal conductance displays almost the same thermal conductance property in both Y-branch and H-branch quantum structures.
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